我按照指南使用带有ng2 + nativescript的nativescript-fresco为我的Android应用程序,因为每次我滚动不止一次然后向上滚动时它就会崩溃。我正在使用它的组件是一个列表视图,显示20个在线图像。 url通过@Input指令从父组件传递,该指令有效。但是,当我切换到FrescoDrawee时,会渲染列表视图,但图像不是。
这是组件的html
<GridLayout columns="*,*,*,*,*,*,*,*,*" height="100" class="item"
xmlns:nativescript-fresco="nativescript-fresco">
<ios>
<Image [src]="data.imageUrl" row="0" col="0" colspan="3" class="ios-product-image" (tap)="details(data)"></Image>
</ios>
<android>
<!--<Image [src]="data.imageUrl" row="0" col="0" colspan="3" class="android-product-image" (tap)="details(data)"></Image>-->
<nativescript-fresco:FrescoDrawee width="100" height="100"
[imageUri]="data.imageUrl"
></nativescript-fresco:FrescoDrawee>
</android>
<StackLayout row="0" col="3" colSpan="5" (tap)="details(data)">
<Label [text]="data.name" class="product-name"></Label>
<Label [text]="data.description" textWrap="true" class="product-description"></Label>
<GridLayout columns="*,*,*,*,*,*,*,*,*,*" class="increment-decrement" style="width: 100%; height: 20%; vertical-align: bottom">
<Label [text]="data.price" class="product-price" col="0" colSpan="5"></Label>
<ios>
<Button text="-" col="5" colSpan="1" (tap)="dec()"></Button>
<Label [text]="count" col="6" colSpan="3" class="product-amount" ></Label>
<Button text="+" col="9" colSpan="1" (tap)="inc()"></Button>
</ios>
<android>
<Label text="-" col="5" colSpan="1" class="inc-dec" (tap)="dec()"></Label>
<Label [text]="count" col="6" colSpan="3" class="product-amount"></Label>
<Label text="+" col="9" colSpan="1" class="inc-dec" (tap)="inc()"></Label>
</android>
</GridLayout>
</StackLayout>
<ios>
<Button col="11" class="cart" colSpan="1"></Button>
</ios>
<android>
<Label col="11" class="cart" colSpan="1"></Label>
</android>
<Image src="~/media/ic_add_shopping_cart_white_24dp.png" col="11"
style="height: 20%; width: 20%;" (tap)="addToCart()"></Image>
</GridLayout>
这是Type-script
import { Component, OnInit, Input} from "@angular/core";
import LabelModule = require("ui/label");
import application = require("application");
import { RouterExtensions } from "nativescript-angular/router";
import { PublicVariables } from "../../shared/publicVariables";
@Component({
selector:'product-list',
templateUrl: 'pages/products/product_list.html',
styleUrls: ['pages/products/product_list-common.css', 'pages/products/product_list.css']
})
export class ProductListComponent implements OnInit {
@Input() data: any;
private count=0;
constructor(private routerExtensions: RouterExtensions) {}
ngOnInit() {
}
details() {
this.routerExtensions.navigate(["/product/:id"]);
PublicVariables.currentProduct = this.data;
}
inc() {
++this.count;
}
dec() {
if(this.count>0) {
--this.count;
}
}
}
我对原生脚本比较新,所以我的代码可能不是最干净的。 我已经将nativescript-fresco插件添加到我的项目中,在AppModule中导入并初始化它。我不知道的是,除了FrescoDrawee标签之外,我是否需要向组件本身添加任何内容,因为我在文档中没有看到任何指示。
请帮我弄清楚我的代码有什么问题?
答案 0 :(得分:0)
我认为问题在于前缀,您可以将其用作:
<FrescoDrawee width="100" height="100" [imageUri]="data.imageUrl"></FrescoDrawee>
为了完整起见,这是与Angular一起使用时需要添加到app.module.ts
的内容:
import { TNSFrescoModule } from "nativescript-fresco/angular";
import fresco = require("nativescript-fresco");
import application = require("application");
if (application.android) {
application.onLaunch = function (intent) {
fresco.initialize();
};
}
@NgModule({
imports: [
TNSFrescoModule